Fan wheel of an axial fan



FIG. 1 is a top plan view of the fan wheel of an axial fan;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a side elevation view thereof; and,

FIG. 4 is another side elevation view thereof.

The broken lines illustrate portions of the fan wheel of an axial fan that form no part of the claimed design. 

CLAIM The ornamental design for a fan wheel of an axial fan, as shown and described. 